BrainPop: Forces

Front

What is true about all forces?

Back

They involve more than one object.

Front

What can you infer about an object moving at a constant velocity?

Back

The forces acting on it are in balance.

Front

What does the measurement unit N stand for?

Back

Newton.

Front

What are unbalanced forces?

Back

Forces that cause a change in speed or direction.

Front

What is the force of drag?

Back

A force that opposes the motion of an object through a fluid.

Front

What is the relationship between force and motion?

Back

A force can cause an object to start moving, stop moving, or change direction.

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is Newton's Second Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

Front

What is Newton's Third Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.